3-2x+6=21

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Solution for 3-2x+6=21 equation: 



3-2x+6=21

We move all terms to the left:

3-2x+6-(21)=0

We add all the numbers together, and all the variables

-2x-12=0

We move all terms containing x to the left, all other terms to the right

-2x=12

x=12/-2

x=-6

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